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Concurrent tectonism and aquifer evolution >100,000 years recorded in cave sediments, Dinaric Karst, Slovenia

Sasowsky, ID and Šebela, S and Harbert, W (2003) Concurrent tectonism and aquifer evolution >100,000 years recorded in cave sediments, Dinaric Karst, Slovenia. Environmental Geology, 44 (1). 8 - 13. ISSN 0943-0105

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Abstract

A natural conduit that had formed along a fault was exposed in Upper Cretaceous limestones during construction of a tunnel near Postojna, Slovenia. The conduit is filled with poorly indurated clastic sediments. Slickensides found on the margin of the sediment deposit show sinistral fault motion that is consistent with regional tectonism. Analysis of the sediments revealed reversed magnetic polarity. The minimum age for latest movement on the fault, origin of the cave, and deposition of these sediments is 780 ka. Present-day tectonic stresses are concordant with the fault movement, and it is likely that the fault has been continuously active throughout growth, infilling, and hydrologic abandonment of the conduit. Based upon known and modeled growth rates for conduits, this system is recording a period of growth and abandonment that exceeds 100,000 years. The role that rock discontinuities play in groundwater flow may vary over these timescales, and it may be important to account for tectonism when evaluating the long-term evolution of aquifers.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Sasowsky, ID
Šebela, S
Harbert, Wharbert@pitt.eduHARBERT
Date: 1 May 2003
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: Environmental Geology
Volume: 44
Number: 1
Page Range: 8 - 13
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Geology and Planetary Science
Refereed: Yes
ISSN: 0943-0105
Date Deposited: 25 Aug 2012 16:12
Last Modified: 02 Feb 2019 15:57
URI: http://d-scholarship.pitt.edu/id/eprint/13676

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